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Old 07-06-2008, 12:20 PM   #1 (permalink)
Power tuner gone eco
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Join Date: Jun 2008
Location: Alberta
Posts: 33

Prudence - '93 BMW 325 i
90 day: 36.64 mpg (US)
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Theoretical Mileage Charts

These guys have a theoretical mileage estimator based on vehicle weight, aerodynamics, horsepower loss of trans, etc.

MPG Estimator

Based on cars more in my 'fleet' I made up some charts I thought I would post as some generalizations (some assumptions). You can see how horsepower loss to transmission, aerodynamics, and weight can effect where you will theoretically get the best gas mileage.

I didn't bother changing BSFC between the engines...

There are so many factors that could alter results, so take it with a grain of salt. But, perhaps it could be a good rough guide for theoretical speeds for gas mileage on a given platform. It also seems to show how slowing it down could make a big difference on a small car, or even a mid-large SUV.

1992 - Suzuki Swift GT
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